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    <h1 style="color:blue">htmlcore</h1>
    <h3 id="my-heading">Made with <i>Cogent Core</i></h3>
    <p class="red">This is a sample <b>HTML</b> <u>document</u> displayed using <code>htmlcore</code>.</p>
    <button>Click me!</button>
    <p>Go to the <a href="https://cogentcore.org/core">Cogent Core website</a></p>
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package main

import "fmt"

func main() {
    fmt.Println("Hello, world!")
}
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